Revealing magnetic domain structure in functional Fe2.5Zn 0.5O4 wires by transmission electron microscopy

Y. Murakami; A. Ohta; A. N. Hattori; T. Kanki; S. Aizawa; T. Tanigaki; H. S. Park; H. Tanaka; D. Shindo

doi:10.1016/j.actamat.2013.10.015

Revealing magnetic domain structure in functional Fe_2.5Zn _0.5O₄ wires by transmission electron microscopy

Y. Murakami, A. Ohta, A. N. Hattori, T. Kanki, S. Aizawa, T. Tanigaki, H. S. Park, H. Tanaka, D. Shindo

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

The magnetic and crystallographic microstructures in Fe _2.5Zn_0.5O₄ (FZO) wires fabricated using nano-imprint lithography, pulsed laser deposition and a molybdenum lift-off mask technique were studied by transmission electron microscopy (TEM). A process using a focused ion beam completely separated the FZO wires from the insulating MgO substrate, and accordingly allowed in-depth TEM studies of the domain structures. Observations using energy-filtered TEM demonstrated good crystallinity of the FZO wires. Both Lorentz microscopy and electron holography studies revealed unexpectedly small magnetic domains (∼100 nm or smaller) due to a significant interaction with antiphase boundaries. The role of antiphase boundaries on the functionalities observed in the constrained wires (e.g., nonlinear I-V characteristics and large magnetoresistance) is discussed on the basis of these microscopic observations.

Original language	English
Pages (from-to)	144-153
Number of pages	10
Journal	Acta Materialia
Volume	64
DOIs	https://doi.org/10.1016/j.actamat.2013.10.015
Publication status	Published - Feb 2014
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

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10.1016/j.actamat.2013.10.015

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@article{ab042c67d1fb4f1aae132321985c7679,

title = "Revealing magnetic domain structure in functional Fe2.5Zn 0.5O4 wires by transmission electron microscopy",

abstract = "The magnetic and crystallographic microstructures in Fe 2.5Zn0.5O4 (FZO) wires fabricated using nano-imprint lithography, pulsed laser deposition and a molybdenum lift-off mask technique were studied by transmission electron microscopy (TEM). A process using a focused ion beam completely separated the FZO wires from the insulating MgO substrate, and accordingly allowed in-depth TEM studies of the domain structures. Observations using energy-filtered TEM demonstrated good crystallinity of the FZO wires. Both Lorentz microscopy and electron holography studies revealed unexpectedly small magnetic domains (∼100 nm or smaller) due to a significant interaction with antiphase boundaries. The role of antiphase boundaries on the functionalities observed in the constrained wires (e.g., nonlinear I-V characteristics and large magnetoresistance) is discussed on the basis of these microscopic observations.",

author = "Y. Murakami and A. Ohta and Hattori, {A. N.} and T. Kanki and S. Aizawa and T. Tanigaki and Park, {H. S.} and H. Tanaka and D. Shindo",

note = "Funding Information: This research was supported by the Management Expenses Grants for National University Corporations from MEXT. The authors also appreciate support by a grant from the Japan Society for the Promotion of Science (JSPS) through the “Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program)”, initiated by the Council for Science and Technology Policy (CSTP), and a Grant-in-Aid for Scientific Research from JSPS.",

year = "2014",

month = feb,

doi = "10.1016/j.actamat.2013.10.015",

language = "English",

volume = "64",

pages = "144--153",

journal = "Acta Materialia",

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TY - JOUR

T1 - Revealing magnetic domain structure in functional Fe2.5Zn 0.5O4 wires by transmission electron microscopy

AU - Murakami, Y.

AU - Ohta, A.

AU - Hattori, A. N.

AU - Kanki, T.

AU - Aizawa, S.

AU - Tanigaki, T.

AU - Park, H. S.

AU - Tanaka, H.

AU - Shindo, D.

N1 - Funding Information: This research was supported by the Management Expenses Grants for National University Corporations from MEXT. The authors also appreciate support by a grant from the Japan Society for the Promotion of Science (JSPS) through the “Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program)”, initiated by the Council for Science and Technology Policy (CSTP), and a Grant-in-Aid for Scientific Research from JSPS.

PY - 2014/2

Y1 - 2014/2

N2 - The magnetic and crystallographic microstructures in Fe 2.5Zn0.5O4 (FZO) wires fabricated using nano-imprint lithography, pulsed laser deposition and a molybdenum lift-off mask technique were studied by transmission electron microscopy (TEM). A process using a focused ion beam completely separated the FZO wires from the insulating MgO substrate, and accordingly allowed in-depth TEM studies of the domain structures. Observations using energy-filtered TEM demonstrated good crystallinity of the FZO wires. Both Lorentz microscopy and electron holography studies revealed unexpectedly small magnetic domains (∼100 nm or smaller) due to a significant interaction with antiphase boundaries. The role of antiphase boundaries on the functionalities observed in the constrained wires (e.g., nonlinear I-V characteristics and large magnetoresistance) is discussed on the basis of these microscopic observations.

AB - The magnetic and crystallographic microstructures in Fe 2.5Zn0.5O4 (FZO) wires fabricated using nano-imprint lithography, pulsed laser deposition and a molybdenum lift-off mask technique were studied by transmission electron microscopy (TEM). A process using a focused ion beam completely separated the FZO wires from the insulating MgO substrate, and accordingly allowed in-depth TEM studies of the domain structures. Observations using energy-filtered TEM demonstrated good crystallinity of the FZO wires. Both Lorentz microscopy and electron holography studies revealed unexpectedly small magnetic domains (∼100 nm or smaller) due to a significant interaction with antiphase boundaries. The role of antiphase boundaries on the functionalities observed in the constrained wires (e.g., nonlinear I-V characteristics and large magnetoresistance) is discussed on the basis of these microscopic observations.

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JO - Acta Materialia

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ER -

Revealing magnetic domain structure in functional Fe_2.5Zn _0.5O₄ wires by transmission electron microscopy

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